Isaiah 43:1-21 The Remnant’s Redeemer, Creator, and King.
Israel’s creator was also their redeemer, he called them and they were his (v. 1 Cf. 44:6; 45:4), and he would be their covenant LORD (v. 3 Cf. Prov. 11:8). As in their past when departing from Egypt and entering the promised land, he would not let the waters overwhelm them, also symbolic of the nations (v. 16 Cf. 51:10; Ex. 14:16, 21-22; Josh. 3:13; Ps. 77:19). The fire also would not consume them (v. 2 Cf. Dt. 31:6; Ps. 66:12; Jer. 30:11). The LORD set his love on the remnant, and the nations would be used to the advantage of his people (v. 4 Cf. 63:9). The remnant need not fear, for the LORD would be with them, and he would gather them from the four corners of the earth from their captivity (vv. 5-6, 14 Cf. 49:12; 54:7; 41:10; 44:2; Jer. 30:10; 46:27-28). The remnant are those who are called by his name, whom he created for his glory (v. 7 Cf. 29:23; Ps. 100:3).
The blind and deaf of apostate Israel, and the nations gathered together, would bear witness to the LORD acting on behalf of his people (vv. 8-9 Cf. 41:21-22, 26; Ezek. 12:2). His people would also bear witness, but it would be of their covenant LORD, their Savior (vv. 10-11 Cf. 44:8; 45:21; 55:4; Hos. 13:4). With their repudiation of idolatry, they would also bear witness that their covenant LORD alone was God (v. 12 Cf. 44:8; Ps. 81:9-10). The LORD alone is the great ‘I am’, existing from all eternity, also the sovereign Lord of providence (v. 13 Cf. 14:27; 48:16; Job 9:12; Ps. 90:2). The LORD was their Redeemer, Creator, and King (vv. 14-15). Their enemies, with armies and horse and chariot would fall, and they would not remember the former times of defeat, as in Egypt (vv. 17-18 Cf. Ex. 14:4-9, 25; Jer. 16:14).
What the LORD would be doing was “a new thing” (v. 19a Cf. 42:9). Hidden things would then be made known (Cf. 48:6). This would find ultimate fulfillment in the advent of the promised Messiah (II Cor. 5:17; Rev. 21:5). There would be a road in the wilderness, and rivers in the desert, that is a source of renewal and life (v. 19b). This too would find ultimate fulfillment in the Messiah to come, who was also that rock in the wilderness, from which water flowed (Cf. 35:1, 6; 48:21; Ex. 17:6; Nu. 20:10-11; Dt. 8:15; Ps. 78:16; I Cor. 10:4). Even the creatures drinking of these waters would honour the LORD (v. 20), and his people whom he formed for himself, would declare his praise (v. 21 Cf. 42:12; Ps. 102:18). Again, this would find ultimate fulfillment in the remnant with the Messiah-delivered to serve him (Cf. Lk. 1:74-75; I Pet. 2:9).